15 and possibly pregnant

Soooo where to start... I'm 2 months late on my period but I haven't had any morning sickness or anything, I didn't have sex exactly 2 months ago. Its July. Last time I was on my period was first week of May. Before I was late I had unprotected sex in March. Then i has sex June 13 but that was already after I was late AND he didn't even "come" it was just for a while. I recently had sex yesterday but he didn't "come" inside of me. My parents had found out I've been having sex at my age aannnnnd they didn't take it so well. My mom didn't talk to me for about a month and my dad for about 4 months. I finally got on good terms with my dad and Idk how I could ever tell him that I might be pregnant. I'm sorta always late on my period anyway but Its never been 2 months late. I've had my period since beginning of 7th grade and Im now going into 10th grade. Is it normal to be this late and not be pregnant? I'm trying to avoid taking a pregnancy test in private and/or having to tell my mom that I'm 2 months late and having her think that I am pregnant. Also, last year in may I had my period for 2 months straight. It literally wouldn't stop until I went with this lady to give me a message around under my belly and she somehow fixed it idk just idk what to do.